DSMZ (Z-Foil)
Vishay Foil Resistors
Document Number: 63121 For any questions, contact: foil@vishay.com
www.vishay.com
Revision: 06-Aug-07 1
Ultra High Precision Bulk Metal
®
Z-Foil Surface Mount Voltage
Divider, TCR Tracking of < 0.1 ppm/°C
, PCR of ± 5 ppm
at Rated Power and Stability of ± 0.005 % (50 ppm)
I
MPROVED P
R
ODUC
T
Any value at any ratio available within resistance range
INTRODUCTION
Bulk Metal
®
Z-Foil Technology out-performs all other resistor
technologies available today for applications that require
ultra-high precision and ultra-high stabilitly.
The Z-Foil technology provides a significant reduction of the
resistive element’s sensitivity to ambient temperature
variations (TCR) and to self heating when power is applied
(power coefficient).
The DSMZ offers low TCR (both absolute and tracking), low
PCR, excellent load life stability, tight tolerance match,
excellent ratio stability, low thermal EMF, and low current
noise - all in one package.
The
DSMZ
surface mount divider provides a matched pair of
Bulk Metal
®
Z-Foil Resistors in a small epoxy molded
package. The electrical specification of this integrated
construction offers improved performance and better real
estate utilization over discrete resistors and matched pairs.
Our Application Engineering Department is available to advise
and make recommendations. For non-standard technical
requirements and special applications, please contact us.
Notes
1. Tighter performances are available
2. 100 Ω to 20 kΩ per resistor available in DSM
FEATURES
• Temperature Coefficient of Resistance (TCR):
Absolute: ± 0.05 ppm/°C typical (0 °C to + 60 °C)
± 0.2 ppm/°C typical
(- 55 °C to + 125 °C, + 25 °C Ref.)
Tracking: 0.1 ppm/°C typical
• Power Coefficient Tracking
“ΔR due to self heating”: ± 5 ppm at Rated Power
• Power Rating at 70 °C: Entire Package: 0.1 W
Each Resistor: 0.05 W
• Tolerance: Absolute: ± 0.02 %; Match: 0.01 %
• Ratio Stability: 0.005 % (0.05 W at 70 °C, 2000 hours)
• Resistance Range: 100 Ω to 10 kΩ per resistor
• Large Variety of Resistance Ratios: 1:100
• Electrostatic Discharge (ESD) above 25 000 V
• Short Time Overload ≤ 0.005 %
• Non Inductive, Non Capacitive Design
• Rise Time: 1.0 ns without ringing
• Current Noise: < - 40 dB
• Thermal EMF: 0.05 µV/°C typical
• Voltage Coefficient: < 0.1 ppm/V
• Non Inductive: < 0.08 µH
• Non Hot Spot Design
• Terminals: silver coated copper alloy
• For better performances, please contact Application
Engineering
APPLICATIONS
• Instrumentation amplifiers
• Bridge networks
• Differential amplifiers
• Ratio arms in bridge circuits
• Medical and test equipment
• Military
• Airborne etc.
* Pb containing terminations are not RoHS compliant, exemptions may apply
TABLE 1 - RESISTANCE VALUES AND TOLERANCES
1)
RESISTANCE VALUES 100 Ω - 10 kΩ per resistor
2)
ABSOLUTE TOLERANCE
EACH RESISTOR
± 0.02 %, ± 0.05 %, ± 0.1 %
RESISTANCE
TOLERANCE MATCH
0.01 %, 0.02 %, 0.05 %
TCR
Absolute: (typical and maximum
spread): ± 0.2 ± 2.0 ppm/°C
- 55 °C to + 125 °C
(+ 25 °C reference)
Tracking: (maximum)
For R1/R2 = 1 0.5 ppm/°C
For 1 < R1/R2 ≤ 10 1.0 ppm/°C
For 10 < R1/R2 ≤ 100 2.0 ppm/°C
FIGURE 1 - SCHEMATIC
OPTION 1
SAME OHMIC VALUE,
SAME ABSOLUTE TOLERANCE
R
1
OPTION 2
RESISTOR PAIR
R
1
/R
2
- DIFFERENT VALUES
R
2
FIGURE 2 - POWER DERATING CURVE
Available
Pb-free
RoHS*
R
1
R
2
Vin
Vout
-
+
DSMZ
125
- 55
90
80
- 60 - 40 - 20 0 20 40 60 80 100 120
70
140
70
60
50
40
30
20
10
0
100
110
Ambient Temperature (°C)
Percent o
Rated Wattage
